This edition scores high on the readility index. Not every cellist who studies these works is a conservatory player, and amateur eyes often appreciate the font, darkness, layout, in addition to markings which usually are changed at will.
*Note. David’s newest and extremely detailed edition is available at his own website. https://starkweatherdavid.com/bach-suites-edition
There is no edition by Casals; Rosanoff was a student. Originally this edition was noted for its oversized, highly readable pages. That changed a few years ago, so be prepared. The number of staves per page varies from 9 to 14 on 8 1/2×11″ pages. So the first page of Suite 1 is easy on the eyes, but Suite 4 Saraband and Bouree I is packed on one page with 14 staves of notes, chords, double stops, slurs, fingerings. Just so you know.
(BA5257) published in 2018, edited by Andrew Talle, is described as “New Urtext Edition with articulation markings.” Includes detailed introduction reassessing the relations between the surviving sources, genesis of the suites, and interpretive practices in Bach’s day.